2007-01-19 03:20:39 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Get a common denominator for the fractions in this case it is 88, the least common multiple of 8 and 11
2/8 * 11/11 = 22/88
10/11 * 8/8 = 80/88
Now the problem looks like this: 13 22/88 - 9 80/88
That equals 3 30/88 which reduces to 3 15/44
2007-01-19 03:31:56 · answer #1 · answered by Ben B 4 · 0⤊ 0⤋
First step:
13 2/8 = [13(8)+2]/8 = 106/8
9 10/11 = [9(11)+10] = 109/11
Second step:
[106(11)]/[8(11)] = 1166/88
[109(8)]/[11(8)] = 872/88
Third step:
1166/88 - 872/88 = 294/88 = 147/44 = 3 15/44
2007-01-19 03:36:56 · answer #2 · answered by Chok Leong C 2 · 0⤊ 0⤋
13 2/8 - 9 10/11 = (13x8+2) /8 - (9x11+10)/11= 106/8-109/11 = (106x11-109x8)/11x8 = (1166-872)/88= 294/88=2 30/88=2 15/44
2007-01-19 03:43:02 · answer #3 · answered by Nathan 2 · 0⤊ 0⤋
=4+2/8-10/11
=[4*88+2*11-9*8]/88
=446/88
=223/44
=5 3/44
2007-01-19 03:55:36 · answer #4 · answered by openpsychy 6 · 0⤊ 0⤋